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Mesoscale

Par gourdeau — Dernière modification 10/04/2015 16:19

Mesoscale in the Solomon Sea

A. Mean circulation

A2. EOF Analysis of SLA Aviso

B. Seasonal cycle

C. EKE

D. DRAK 12: Link EKE and circulation

E. Eddies from alti, DRK12 and gliders

F. Eddies from gliders

G. Figures for a paper

H. 3D eddies gliders

I. 3D eddies DRK12

 

 

A. Mean circulation

1. a. Mean SSH from RIO09.gif; b. Mean SSH from RIO09ssalti.gif

2. a. Mean SSH from DRAK12.gif;  b. Mean SSH from DRAK025.gif

3. a. Mean curl (Quicksat).gif; b. Mean tau and curl (DRAK12).gif

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A2. EOF analysis of SLA Aviso

Mode 1.gif; Mode 2.gif; Mode 3.gif; Mode 4.gif; Mode 5.gif

B. Seasonal cycle

1. a. rms SSH Aviso.gif;  b. rms SSH DRAK12.gif

2. a. <MAR-MAY>.gif;  b. <JUL-SEP>.gif

3. Tau and curl: <JAN-MAR> .gif;  b. <MAY-JUL>.gif

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C.EKE

The computation of EKE is based on two SLA product: the original gridded product and the high pass filtered (half power at 6 months) SLA signal.

1. Mean EKE: spatial distribution and temporal evolution

a. From the original SLA

1.SLA

After data processing: SLA.gif; F(t)Clim + SLA.gif; ; slarms fonction of time.gif

2. XYEKE.gif; F(t)Clim + EKEHF.gif

After data processing: XYEKE.gif; F(t)Clim + EKEHF.gif

EKE GT 400: XYEKE.gif; F(t)Clim + EKEHF.gif

EKE LT 350: XYEKE.gif; F(t)Clim + EKEHF.gif

b. From the high pass filtered SLA

1.SLAHF; slarms fonction of time.gif

After data processing: SLAHF.gif; F(t)Clim + SLAHF.gif; slarms fonction of time.gif

The first two EOF modes are discardes: SLAfltmd12.gif

2. XYEKE.gif; F(t)Clim + EKEHF.gif

After data processing: XYEKE.gif; F(t)Clim + EKEHF.gif

EKE nord 8°S: XYEKE.gif

EKE sud 8°S: XYEKE.gif

c. From the SLA filtered from EOF modes 1-2

1. The first two EOF modes are discardes: SLAfltmd12.gif

2. XYEKEfltmd12.gif

3. XYEKE + time evolution.gif; F(t)Clim + EKEHF.gif

4. Time evolution depending on region

a. EKE.gif; EKE Sud.gif; EKE Nord.gif; EKE NordSud.gif; EKE NordNord.gif

b. Sesonal cycle.gif

c. Low frequency modulation.gif

 

2. Link SLA/EKE altimetry and model circulation

a. SLAhf rms/SW.gif

b. SLAhf rms/SW-UTW vectors.gif

c. EKEhf/SW.gif

d. EKEhf/UTW.gif

e. EKEhf/SW-UTW vectors.gif

f. EKE/southvgsurface.gif

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D. DRAK 12: Link EKE and circulation

Attention: sossheig  dérive: mean Solomon Sea in time.gif

Validatin of the model with current observation at TAO moorings: tao.gif

1. EKE

a. EKE surface layer (0-100).gif; EKE from SSH.gifMKE.gif;

b. Mean EKE at the surface from: daily sampling.gifmonthly sampling.gifannual sampling.gif

c. EKE from SSH high pass filtered:

EKE from sossheig when EOF mode 1 et 2 are suppressed.gif;

same with surface MKE overlaid.gif;

same with surface circulation overlaid.gif, same with deep circulation.gif

same with surface density.gif

same with eddy time scale.gif

same with vertical shear.gif

same with horizontal shear.gif

same with surface vorticity.gif

c.1  time evolution depending on area

a. EKE.gif; EKE Sud.gif; EKE Nord.gif; EKE NordSud.gif; EKE NordNord.gif

b. Sesonal cycle.gif

d. Thermocline layer (100-400).gif

e. EKE spectra: 

frequency domain mean U spectrum.giffrequency domain mean V spectrum.gif; frequency domain mean EKE spectrum.gif

f. EOF EKE analysis

1. at the surface: UV mode 1.gif; UV mode 2.gif; UV mode 3.gif

2. at the surface: UVhf mode 1.gif; UVhf mode 2.gif; UVhf mode 3.gif

3. at the surface: SSHeke mode 1.gif; SSHeke mode 2.gif; EKEssh mode 3.gif; EKEssh mode 4.gif

4. at the thermocline (100-400): UV mode 1.gif; UV mode 2.gif; UV mode 3.gif

g. Seasonal EKE: April-June.gifOctober-November.gif

 

2. Velocity

a. Zonal sections: 10.5S.gif; 9S.gif; 7.5S.gif; 6.5S.gif

b. Meridional sections: 152E.gif; 153E.gif; 154E.gif; 155E.gif

c. Seasonal cycle of the SEC, NVJ and NQC.gif; Seasonal cycle of the SEC_U-V, NVJ, NQC, 9°S and Vitiaz.gif

 

d. Transports across the Solomon Sea.gifInflow transport.gif

3. SSH

a. SSH spectra: 149E-7S.gif ; 152E-8S.gif ; 153E-5S.gif; 154E-8.5S.gif; 155E-7.5S.gif; 155E-10S.gif; 157E-9S.gif

frequency domain mean spectrum.gifzonal wavenumber mean spectrum.gifmeridional wavenumber mean spectrum.gif (in a 3°x3° box)

b. EOF SSH analysis (based on monthly sampling)

mode 1.gif; mode 2.gif; mode 3.gif; mode 4.gif; mode 5.gif; mode 6.gif

c. SSH filtered from EOF modes 1 and 2

rms ssh.gif

 

4. Zonal sections:

a. 10.5S:  EKE-V-rho.gifETS-V-DxRho.gifDyPv-V-PV.gif

b. 8.1S:   EKE-V-rho.gifETS-V-DxRho.gifDyPv-V-PV.gif

c.  7 S:  EKE-V-rho.gif; ETS-V-DxRho.gifDyPv-V-PV.gif

d.  7 S:  EKE-V-rho.gif; ETS-V-DxRho.gifDyPv-V-PV.gif

 

5. saisonal cycle of EKE:

a. saisonal shear.gif; Function of the area.gif (N: north of 9°S, NN: north of 6.5°S, NS: between 9-6.5°S, S: south of 9°S)

b. At 8°S: EKE-V.gif; EKE-vshear.gif; EKE-hshear.gif; <may-June>V-EKE-shear.gif; EKEHVshear 154E.gif

 

6. Low frequency modulation

a. time evolution.gif; seasonal and low frequency evolution.gif

b.. Low frequency modulation.gif

c. EKES-NVJ.gif; EKENN-SECU.gif

d. EKES Trsp SEC NVJ.gif; EKENN Trsp SEC Vitiaz.gif

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E. Eddies from alti, DRK12 and gliders

1. The glider tracks.gif

2. Eddy tracking

a. AVISO: (CE: green, AE: blue, dist>250, dt >2months))

b. DRAKKAR12: (CE: green, AE: blue, dist>350, dt >1months))

3. Eddy characteristics

a. AVISO: Percentage of eddy function of lifespan.gif; DRK12: Percentage of eddy function of lifespan.gif

b. AVISO: Mean distance traveled function of lifespan.gif; DRK12: Mean distance traveled function of lifespan.gif

c. AVISO: Mean eddy EKE function of lifespan.gif

d. AVISO: Eddies occurence.gif

CE eddies: spatial distribution of all eddies.gifdistribution of eddy generation.gif; distribution of stationnary eddy generation.gif; distribution of propagative eddy generation.gif; distribution of final position.gif

AE eddies: spatial distribution of all eddies.gif; distribution of eddy generation.gif; distribution of final position.gif

e. Histogram:

CE stationary: Radius.gif; amplitude.gif; EKE.gif

CE propagative: Radius.gif; amplitude.gif; EKE.gif

CE: Radius.gif; amplitude.gif; EKE.gif; Distance.gif; lifespan.gif

AE: Radius.gif; amplitude.gif; EKE.gif; Distance.gif; lifespan.gif

4. Maps of eddy trajectory

a AVISO: . CE with long lifespan and short distance traveled.gif; DRK12: CE with long lifespan and short distance traveled.gif

b. AVISO: CE with long lifespan and long distance traveled.gif; DRK12: CE with long lifespan and long distance traveled.gif

c. AVISO: AE.gif; DRK12: AE.gif

5. Time evolution of eddy number

a. relation with EKEHF.gif; Stationnary CE filtered: relation with EKEHF.gif

b. Low frequency versus SOI and saisonal cycle versus EKEHFCL.gif; Stationnary CE filtered: LF + CL.gif

6. Colocalisation of eddies between altimetry and glider mission

a. mission03.gif; mission04.gif; mission05.gif; mission06.gif; mission07.gif; mission08.gif; mission09.gif; mission10.gif; mission11.gif; mission12.gif; mission13.gif; mission14.gif;

7. The eddies crossed by the glider

a. eddy_mission03.gif; eddy_mission05.gif; eddy_mission07.gif; eddy_mission08.gif; eddy_mission09.gif; eddy_mission11.gif; eddy_mission12a.gif; eddy_mission12b.gif; eddy_mission14.gif

8. TS relationship related to eddies

a. TS eddy m12b.gif; TS eddy m14.gif

9. Test on the cross track geostrophic velocity (Mission 5)

a.glider:  Ucrtrck_ref.gif; Ucrtrck_z0.gif; Ucrtrck_abs_z0.gif; Ucrtrck_z0-150.gif; Ucrtrck_abs_z0-150.gif; Ucrtrck_abs_z50-150.gif

b. Alti: Ucrtrck_mean.gif; Ucrtrck_geo.gif; Ucrtrck_abs.gif

10. Cross track velocity for glider and alti

a. glider: mission1 (4).gif; mission2.gif; mission3.gif; mission4.gif; mission5.gif; mission6.gif; mission7.gif; mission8.gif; mission9.gif; mission10.gif

b. alti: mission1 (4).gif; mission2.gif; mission3.gif; mission4.gif; mission5.gif; mission6.gif; mission7.gif; mission8.gif; mission9.gif; mission10.gif

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F. Eddies observed from glider

 a. Cyclinic eddies

- Mission 7: one cyclonic eddy around 156°E 10°S

Detection of glider eddy from AVISO:

Comparison of cross track current: ucrtrck_gld7.gif; ucrtrack_aviso7.gif;

MADT versus hdyn(z=700/75).gif

AVISO eddies.gif  (plot of aviso eddies with a lifespan higher than 20 jours around the glider mission (+- 20 days))

Cyclonic eddy around 156°E 10°S, km: 145:299, days:18-25/11/2008: CE_glid7.gif

 Eddy characteristic from glider:

T glider.gifS glider.gif;   U glider.gif: Uabs glider.gif

Eddies from DRK12 crossing the glider trajectory at the place where the eddy is observed:

15 eddies from DRAKKAR are selected: their trajectory.gif

Eddy N° 185:  trajectory.gif; On glider section: Tdrk.gif, Sdrk.gif, ucros_drk.gif

- Mission 11: one cyclonic eddy around 156.5°E 9.5°S

Detection of glider eddy from AVISO:

Comparison of cross track current: ucrtrck_gld11.gif; ucrtrack_aviso11.gif;

MADT versus hdyn(z=700/75).gif

AVISO eddies.gif  (plot of aviso eddies with a lifespan higher than 20 jours around the glider mission (+- 20 days))

Cyclonic eddy around 156.5°E 9.5°S, km: 74:226, days:18-25/04/2010: CE_glid11.gif

 Eddy characteristic from glider:

T glider.gifS glider.gif;   U glider.gif: Uabs glider.gif

Eddies from DRK12 crossing the glider trajectory at the place where the eddy is observed:

11 eddies from DRAKKAR are selected: their trajectory.gif

Eddy N° 198:  trajectory.gif; On glider section: Tdrk.gif, Sdrk.gif, ucros_drk.gif

Eddy N° 210:  trajectory.gif; On glider section: Tdrk.gif, Sdrk.gif, ucros_drk.gif

Eddy N° 270:  trajectory.gif; On glider section: Tdrk.gif, Sdrk.gif, ucros_drk.gif

- Mission 12: two cyclonic eddies in the northern basin

Detection of glider eddy from AVISO:

Comparison of cross track current: ucrtrck_gld12.gif; ucrtrack_aviso12.gif;

MADT versus hdyn(z=700/75).gif

AVISO eddies.gif  (plot of aviso eddies with a lifespan higher than 20 jours around the glider mission (+- 20 days))

Cyclonic (stationnary) eddy around 152°E 6.5°S, km: 673:1202, days:10-31/05/2010: CE1_glid12.gif

Cyclonic (propagative) eddy around 151.5°E 6.5°S, km: 1978:2140, days:12-19/07/2010: CE2_glid12.gif

 Eddy characteristic from glider:

T glider.gif;  S glider.gif;   U glider.gif: Uabs glider.gif

Eddies 1 from DRK12 crossing the glider trajectory at the place where the eddy is observed:

15 eddies from DRAKKAR are selected: their trajectory.gif

Eddy N° 12:  trajectory.gif; On glider section: Tdrk.gif, Sdrk.gif, ucros_drk.gif

Eddy N° 20:  trajectory.gif; On glider section: Tdrk.gif, Sdrk.gif, ucros_drk.gif

Eddy N° 110:  trajectory.gif; On glider section: Tdrk.gif, Sdrk.gif, ucros_drk.gif

Eddy N° 339:  trajectory.gif; On glider section: Tdrk.gif, Sdrk.gif, ucros_drk.gif

Eddies 2 from DRK12 crossing the glider trajectory at the place where the eddy is observed:

15 eddies from DRAKKAR are selected: their trajectory.gif

Eddy N° 73:  trajectory.gif; On glider section: Tdrk.gif, Sdrk.gif, ucros_drk.gif

Eddy N° 161:  trajectory.gif; On glider section: Tdrk.gif, Sdrk.gif, ucros_drk.gif

Eddy N° 189:  trajectory.gif; On glider section: Tdrk.gif, Sdrk.gif, ucros_drk.gif

Eddy N° 288:  trajectory.gif; On glider section: Tdrk.gif, Sdrk.gif, ucros_drk.gif

Eddy N° 342:  trajectory.gif; On glider section: Tdrk.gif, Sdrk.gif, ucros_drk.gif

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G. Figures for a paper

a. Mean circulation from DRAKKAR12.gif

b . Absolute cross track surface geostrophic velocity from altimetry.gifAbsolute cross track surface geostrophic velocity from glider.gifContribution from the MSSH Rio09.gif

 

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H. 3D eddies gliders

 

Location of the different eddies observed by gliders.gif

 

1. Mission03: One cyclonic eddy

a. Altimetric and glider surface current.gif

b. Dynamic height along track signature.gif

c along track signature of: T.gif; S.gif, R.gif, U.gif, Uabs.gif

d. eddies signature in anomalies of: Ta.gif; Sa.gif, Rhoa.gif; U.gif

 

2. Mission05: One anticyclonic eddy

GLIDER

a. Altimetric and glider surface current.gif

b. Dynamic height along track signature.gif

c along track signature of: T.gif; S.gif, R.gif, U.gif, Uabs.gif

                d. eddies signature in anomalies of: Ta.gif; Sa.gif, Rhoa.gif; U.gif
DRAKKAR12
a. selectededdies.gif   (4 eddies)
b. example eddy61: eddy.gif ; U.gif ; Ta.gif, Sa.gif

c. Composite

UV.gif

anomaly relative to monthly mean:    Talf.gif, Salf.gif, Rhoalf.gif; Tsigalf.gif; Ssigalf.gif

anomaly relative to the edges:          Ta.gif, Sa.gif, Rhoa.gif; Tsiga.gif; Ssiga.gif

 

3. Mission07: One cyclonic eddy

GLIDER

a. Altimetric and glider surface current.gif

b. Dynamic height along track signature.gif

c along track signature of: T.gif; S.gif, R.gif, U.gif, Uabs.gif  function of depth

                d. eddies signature in anomalies of: Ta.gif; Sa.gif, Rhoa.gif; U.gif function of depth

DRAKKAR12

a. selectededdies.gif   (15 eddies)

b. example eddy6:   Eddy.gif ; U.gif; Ta.gif, Sa.gif

      Ra.gif; Ralf.gif; Tasig.gif; Tasiglf.gif; Sasig.gif; Sasiglf.gif

    example eddy210:   Eddy.gif ; U.gif; Ta.gif, Sa.gif

c. Composite

UV.gif

anomaly relative to monthly mean:    Talf.gif, Salf.gif,     (Rhoalf.gif; Tsigalf.gif; Ssigalf.gif)

anomaly relative to the edges:       (   Ta.gif, Sa.gif, Rhoa.gif; Tsiga.gif; Ssiga.gif  )

 

4. Mission 11: Two cyclonic eddies

a. Dynamic height along track signature.gif

b. along track signature of: T.gif; S.gif, R.gif, U.gif,  Uabs.gif         

Cyclone 1:

c1. Altimetric and glider surface current.gif

d.1 eddies signature in anomalies of: Ta.gif; Sa.gif, Rhoa.gif; Ugeo.gif

Cyclone 2:

c2. Altimetric and glider surface current.gif

d2. eddies signature in anomalies of: Ta.gif; Sa.gif, Rhoa.gif; U.gif

 

5. Mission 12: One cyclonic eddy

GLIDER

a. Dynamic height along track signature.gif

b. along track signature of: T.gif; S.gif, R.gif, U.gif,  Uabs.gif         

c. Altimetric and glider surface current.gif

d. eddies signature in anomalies of: Ta.gif; Sa.gif, Rhoa.gif; U.gif

DRAKKAR12

a. selectededdies.gif   (15 eddies)

        b  example eddy110:   Eddy.gif ; U.gif; Ta.gif, Sa.gif

c. Composite

UV.gif

anomaly relative to monthly mean:    Talf.gif, Salf.gif, Rhoalf.gif; Tsigalf.gif; Ssigalf.gif

anomaly relative to low pass monthly mean :    Talf.gif, Salf.gif,

anomaly relative to the edges:          Ta.gif, Sa.gif, Rhoa.gif; Tsiga.gif; Ssiga.gif

 

6. Mission 13: One cyclonic eddy

a. Dynamic height along track signature.gif

b. along track signature of: T.gif; S.gif, R.gif, U.gif, Uabs.gif         

c. Altimetric and glider surface current.gif

d. eddies signature in anomalies of: Ta.gif; Sa.gif, Rhoa.gif; U.gif

 

7. Mission 14: One cyclonic eddy

a. Dynamic height along track signature.gif

b. along track signature of: T.gif; S.gif, R.gif, U.gif, Uabs.gif         

c. Altimetric and glider surface current.gif

d. eddies signature in anomalies of: Ta.gif; Sa.gif, Rhoa.gif; U.gif


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I. 3D EDDIES DRK12

A.. propagative cyclonic eddy

A.1 Mean characteristic

a. eddy tracks.gif   b. mean vertical eddy signature (okbw, swirl, amp, vort).gif
c. rms vertical eddy signature (okbw, swirl, amp, vort).gif

A.2 example of eddy 309 at a given time (jt=4):

a. eddytrack309_jt4hdfield-swirl.gif;  b. eddytrack309_jt4okbwfield.gif

c. Vzonalsection_jt4.gif;   d. vertical eddy309 (okbw,swirl,amp,vort).gif, e. OKBWzonalsection.gif

A.3 All eddies

a. depth of efficiency of the eddies based on non linearity.gif

b. Temperature anomaly.gif;  c. Salinity anomaly.gif  d. Mean Ta Sa.gif

e. Sigma T anomaly.gif;  f. Sigma S anomaly.gif g. Mean sigma Ta Sa.gif

h. TS relation ship.gif

A.4 Example of along track eddy 208

a. Ta Sa function of z.gif;  b. Ta Sa function of sigma.gif;  c. TS diagram.gif

d. T at sigma23.3.gif; e. T at z132m.gif; f. S at at z 132m.gif; g. NonLinearity.gif


2. Stationnary cyclonic eddy

a. eddy tracks.gif   b. mean vertical eddy signature (okbw, swirl, amp, vort).gif

c. rms vertical eddy signature (okbw, swirl, amp, vort).gif

example of eddy 12 (jt=4):

d. eddytrack309_jt4hdfield-swirl.gif;  e. eddytrack309_jt4okbwfield.gif

f. Vzonalsection_jt4.gif;   g. vertical eddy309 (okbw,swirl,amp,vort).gif

All eddies

h. depth of efficiency of the eddies based on non linearity.gif

i. Temperature anomaly.gif;  j. Salinity anomaly.gif

k. Sigma T anomaly.gif;  l. Sigma S anomaly.gif

m. TS relation ship.gif

3.  anticyclonic eddy

A.1 Mean characteristic

a. eddy tracks.gif   b. mean vertical eddy signature (okbw, swirl, amp, vort).gif

c. rms vertical eddy signature (okbw, swirl, amp, vort).gif

A.2 example of eddy 12 at a given time (jt=4):

a. eddytrack120_jt4hdfield-swirl.gif;  b. eddytrack120_jt4okbwfield.gif

c. Vzonalsection_jt4.gif;   d. vertical eddy309 (okbw,swirl,amp,vort).gif,  e. OKBWzonalsection.gif

A.3 All eddies

a. depth of efficiency of the eddies based on non linearity.gif

b. Temperature anomaly.gif;  c. Salinity anomaly.gif; d. Mean Ta Sa.gif

e. Sigma T anomaly.gif;  f. Sigma S anomaly.gif;  g. Mean sigma Ta Sa.gif

h. TS relation ship.gif

A.4 Example of along track eddy 70

a. Ta Sa function of z.gif;  b. Ta Sa function of sigma.gif;  c. TS diagram.gif

d. T at sigma23.3.gif; e. T at z132m.gif; f. S at at z 132m.gif; g. NonLinearity.gif

 

4.. Eddies function of time.gif

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